after sales service guide - akvedukts · the diematic isystem control panel from the room in which...

After Sales Service Guide

Control panel DIEMATIC iSystemFor INNOVENS MCA wall-hung gas condensing boilers

300022803-001-B 11/02/2010

Use of this guide is reserved for qualified professionals

Used symbols

Any intervention on the appliance and heating equipmentmust be carried out by a qualified technician.

Abide by prevailing local regulations.

Caution danger Risk of injury and damage to equipment. Attention must be paid to the warnings on safety of persons and equipment

Specific information Information must be kept in mind to maintain comfort

Reference Reference to other paragraphs in the guide

2

1234567

1. PRESENTATIONContents: page 6

2. OPERATING PRINCIPLEContents: page 14

3. CONFIGURATION OF THE CIRCUITSContents: page 20

4. LIST OF THE PARAMETERSContents: page 50

5. LIST OF THE MESSAGES AND DEFECTSContents: page 86

6. CONTROLS AND SETTINGS - ELECTRICAL DIAGRAMContents: page 102

7. PRODUCT DEVELOPMENTContents: page 116

3

1

PRESENTATION

5

1

CONTENTS

1. Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2. Description of the keys and the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3. Options for the DIEMATIC iSystem control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6

1

1. Presentation

The control panel DIEMATIC iSystem equips the boilers INNOVENS MCA.The DIEMATIC iSystem control panel is an electronic regulator which can be programmed, and ensures the followingfunctions:

- Boiler temperature control via the modulating burner (in the case of the MCA wall-hung boiler) according to theoutside temperature and, if applicable, the room temperature if a CDI4, CDR4 or simplified interactive remotecontrol (available as optional equipment) is connected,

- Command and control of a direct circuit without mixing valve- Command and control of a first circuit with mixing valve, with the flow sensor option (Option package AD199),- Command and control of a second mixing valve circuit, with the PCB + flow sensor option (Option package

AD249).Nota: Each of these 3 heating circuits can be equipped with a CDI4, CDR4 or simplified FM52 remote control(Options).

- Programming and priority control of a DHW circuit, with DHW sensor option (Package AD212),- Anti-freeze protection for the installation and the environment if the home is empty- 2 to 10 boilers can be connected in a cascade,- Option of connecting 1 to 10 DIEMATIC VM control systems- Management of systems combining various heating generators (boiler + heat pump or boiler + solar system…)

This allows the installer to set the parameters for the heating system as a whole.

Main ON/OFF switch

7

1

2. Description of the keys and the display

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

A

B

C

D E F

G

G0

00

011

-A

I

H

A Temperature setting key (heating, DHW, swimming pool)B Operating mode selection keyC DHW override keyD Key to access the parameters reserved for the installerE Keys on which the function varies as and when selections

are madeF Rotary setting button and push button:

: Turn the rotary button to scroll through the menus or modify a value : Press the rotary button to access the menu selected

or confirm a value modificationG A bar is displayed when a DHW override is activated:

Flashing bar: Temporary override Steady bar: Permanent override

H Name of the circuit for which the parameters are displayedI Timer programmes graphic display bar:

Dark area : Heating period in comfort mode or DHW production enabled Light area : Heating period in reduced mode or DHW

production not enabled

SymbolsComfort mode: The symbol is displayed when a DAY override (comfort) is activated Flashing symbol: Temporary override Steady symbol: Permanent override

Reduced mode: The symbol is displayed when a NIGHT override (reduced) is activated Flashing symbol: Temporary override Steady symbol: Permanent override

Holiday mode: The symbol is displayed when a HOLIDAY override (antifreeze) is activated Flashing symbol: Holiday mode programmed Steady symbol: Holiday mode active

Manual modeThe symbol is displayed when domestic hot water productionis running

Valve indicator: The symbol is displayed when a 3-way valveis connected

: Opening the 3-way valve: Closing the 3-way valve

The symbol is displayed when the pump is operatingAccess to the various menusUsed to scroll through the menusUsed to scroll through the parametersUsed to display the curve of the parameter selected

? The symbol is displayed when help is availableSTD Reset of all time programmes

/ Comfort/reduced selection or selection of the days to be programmedBack to the previous level

ESC Back to the previous level without saving the modifications madeManual resetArrows are displayed when lines are masked higher or lower in the list. Both arrows flash when it is possible to modify a value.Flame statusPressure indicator: The symbol is displayed when a water pressure sensor is connected Flashing symbol: The quantity of water is insufficient Steady symbol: The quantity of water is sufficient.

Water pressure level:: 0,9 to 1,1 bar: 1,2 to 1,5 bar: 1,6 to 1,9 bar: 2,0 to 2,3 bar

: > 2,4 barSummer mode: Reheating the domestic hot water remains ensuredWINTER mode: Heating and domestic hot water working

AUTO Operation in automatic mode according to the timerprogramme

8

1

3. Options for the DIEMATIC iSystem control panelDomestic hot water sensor - Package AD212The DHW sensor is used for the priority control of the temperature and the programmingof domestic hot water production by an accumulation tank.

Outlet sensor after 3-way valve - Package AD199This sensor is needed to connect the first circuit with mixing valve to a boiler equippedwith the DIEMATIC iSystem control panel.

PCB + sensor for a mixing valve - Package AD249The PCB + sensor option is used to command a mixing valve with electromechanical orelectrothermal motor and the associated heating pump. The PCB is installed in theDIEMATIC iSystem control panel and is connected using plug-in connectors. TheDIEMATIC iSystem control panel can accommodate 1 PCB + sensor option.

CDI4 interactive remote control - Package AD254CDR4 interactive radio remote control module (without transmitter / radioreceiver) - Package AD253Boiler radio module (Transmitter/receiver) - Package AD252The connection of an interactive remote control is used to override all instructions fromthe DIEMATIC iSystem control panel from the room in which it is installed. Theinteractive control also enables the self-adaptivity of the heating law for the circuitconcerned (one CDI4 or CDR4 per circuit).In the case of the CDR4, data is transmitted by radio waves from the point of installationto the transmitter / receiver unit (package AD252) located in the vicinity of the boiler.

A simplified remote control with room sensor - Package FM52The connection of a simplified remote control is used to override certain instructions fromthe DIEMATIC iSystem control panel from the room in which it is installed:programme and room temperature set point override. The remote control is used toautomatically adapt the heating curve on the circuit concerned (one simplified remotecontrol per circuit).

BUS connection cable (length 12 m package AD134)The BUS cable is used to interconnect two boilers equipped with the DIEMATIC iSystemcontrol panel in a cascade installation and to connect a DIEMATIC VM control systemor a transmitter from a remote management network.

Sensor for storage tank - Package AD250Includes 1 sensor for managing a storage tank with a boiler equipped with a DIEMATICiSystem control panel.

9

1

Outside radio-controlled temperature sensor - Package AD251Boiler radio module (Transmitter/receiver) - Package AD252The radio-controlled outside temperature sensor is available as an option for systems inwhich the installation of the wire-controlled outside temperature sensor delivered withthe DIEMATIC iSystem control panel turns out to be too complex. If this sensor is used with a wire-controlled remote control (AD254 or FM52), the boilerradio module (package AD252) is also needed.If a boiler radio module is already connected to the DIEMATIC iSystem control panel, itis not necessary to order a second one.

TELCOM voice remote monitoring module - Package AD152Intended for the control of heating installations by phone, the module handles 2functions:1. To inform the user or a person of his choice (4 phone numbers can be programmed)

if there are problems with the installation (no mains voltage, burner defect or externalalarm)

2. To enable the user to remotely manage the boiler operating mode and two othercircuits (e.g.: water heater). This module is recommended particularly for second homes, temporarily unoccupiedmain homes (holidays, etc.), and small collective systems.The TELCOM works with all telephones with voice-frequency type dialling on bothland lines and mobiles (GSM). Moreover, it comprises a function enabling use with afax or a phone answering machine, provided that it can be programmed to pick upafter the third ring.

10

2

OPERATING PRINCIPLE

13

2

CONTENTS

1. General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2. Description and operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162.1 Description of the control equipments - Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162.2 Description of the BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162.3 Functional links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

14

2

1. General descriptionThe DIEMATIC iSystem control panel is an electronic regulator which can be programmed, and ensures the followingfunctions:

- Boiler temperature control via the modulating burner (in the case of the MCA wall-hung boiler) according to theoutside temperature and, if applicable, the room temperature if a CDI4, CDR4 or simplified interactive remotecontrol (available as optional equipment) is connected,

- Command and control of a direct circuit without mixing valve- Command and control of a first circuit with mixing valve, with the flow sensor option (Option package AD199),- Command and control of a second mixing valve circuit, with the PCB + flow sensor option (Option package

AD249).Nota: Each of these 3 heating circuits can be equipped with a CDI4, CDR4 or simplified FM52 remote control(Options).

- Programming and priority control of a DHW circuit, with DHW sensor option (Package AD212),- Anti-freeze protection for the installation and the environment if the home is empty- 2 to 10 boilers can be connected in a cascade,- Option of connecting 1 to 10 DIEMATIC VM control systems- Management of systems combining various heating generators (boiler + heat pump or boiler + solar system…)

This allows the installer to set the parameters for the heating system as a whole.

15

2

2. Description and operation

2.1 Description of the control equipments - AbbreviationsPCU: Primary Control Unit - PCB for managing burner operation.

The parameters for the PCU board are displayed in specific menus: #PRIMARY LIMITS and #PRIMARY INSTAL.P.Messages from the PCU board have a code that starts with Bxx.Defects on the PCU board have a code that starts with Lxx.

PSU : Parameter Storage Unit - Parameter storage for PCBs PCU and SU.If a PCU or SU board is replaced, it is not necessary to reset the parameters displayed in the #PRIMARY LIMITS and #PRIMARY INSTAL.P menus. These settings are memorised in the PSU board.If the PSU board is replaced, the parameter settings for the #PRIMARY LIMITS and #PRIMARY INSTAL.P menus should be done again.The PSU is electrically connected to the PCU but the communication link is also made between PSU and SU.

SCU: Secondary Control Unit - DIEMATIC iSystem control panel PCB. This board pilots all secondary systems (circuits A, B, C, DHW and AUX) and sends the summary of demands on these circuits to the PCU via the PCU bus.

SU : Safety Unit - Safety PCB (Safety box).CDI4: Interactive wire-controlled remote control with LCD display.CDR4: Interactive radio remote control with LCD display.FM52: Simplified remote controlMCR4 : Boiler radio moduleHMI: Display (Human Machine Interface)IOBL: Carrier current home automation bus.

2.2 Description of the BUS• CDI bus: handles the link between the remote controls and the boiler• Cascade bus: handles the links in the cascade (DIEMATIC VM regulator, TELCOM telemanagement transmitter)• PCU bus: used to communicate with the PCU board :

DIEMATIC iSystem to PCU:- Burner on/off command- Boiler set point temperature- Output capping

PCU to DIEMATIC iSystem:- Measurements- Faults (Lxx) / Messages(Bxx)- present states (Pump, Gas valve, Flame status,...)- Parameters

• IOBL bus (In One By Legrand): Communication on carrier current (works with In One By Legrand products...).

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2

2.3 Functional links

Location of the boards

* Board for 3-way-valve (option)

PRIMARY(Boiler)

SECONDARY(Installation)

G00

0010

SCU-C(DIEMATIC iSystem)

- Piloting the PCU- Direct circuit A- Circuit B- Circuit C- DHW circuit- DHW ELEC- Auxiliary circuit- Cascade- Pool- high temperature

heating circuit- Buffer tank

HMI-display

valve option PCB

AD249

CDI bus

3 CDI4 / FM52 or 1 MCR4

- Boilers (Cascade)- DIEMATIC VM- Teleprocessing transmitter

Cascade bus

Pump CBOILER P.OP. 3WV CCL. 3WV C

- DHW sensor- Outside sensor- Outlet sensor B- Outlet sensor C- A ROOM sensor- B ROOM sensor- C ROOM sensor- TAS- System sensor- TEL INPUT

PCU bus

PCUGenerator

control

bus

SU- Safety- Gas

PSU

- Gas valve- Ignition transformer

- Boiler pump (ON/OFF + modulation

- DHW reversal valve- Fan control- BIC: DHW load pump

- Input BL- Fan speed- Flow switch (MI)- DHW tank

temperature (BIC)

- Boiler temperature- Return temperature- Ionisation

measurement- Safety thermostat

G000028

SCU

PCU

SU

AD249*

PSU

HMI

Pump APump BHW. PUMPOP. 3WV BCL. 3WV BTEL.OUTPUT

17

3

CONFIGURATION OF THE CIRCUITS

G000002

19

3

CONTENTS

Installation and connection examples

1. Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2. Configuration to be done beforehand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3. Connecting a direct circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4. Connecting a direct heating circuit and a domestic hot water tank . . . . . . . . . . . . . . . . . . 24

5. Connecting two circuits and a domestic hot water tank before the mixing tank . . . . . . . . 26

6. Connecting two circuits and a domestic hot water tank after the mixing tank. . . . . . . . . . 28

7. Hot water storage tank connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7.1 QUADRO DU type storage tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 7.2 PS type storage tank and DHW tank loaded by the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 7.3 PS type storage tank and DHW tank loaded by this storage tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

8. Pool connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9. Connecting a mixed tank (DHW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

10. Connecting the options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

11. Connection in cascade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 11.1 Cascade management principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 11.2 Possible checks (on the "master" boiler) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 11.3 Parameter settings in the case of a cascade installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 11.4 DHW tank after the mixing tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46 11.5 DHW tank on "master" boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

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1. Safety instructionsCAUTIONWhen working on the boiler, always disconnect the boiler from the mains and close the main gas inletvalve.After maintenance or repair work, check all installations to ensure that there are no leaks.

The mains supply is made via the cable C connected to the mains. All other external connections are done on the connection connectors (low voltage). The main characteristics of the control unit are described in the table below:

Power supply voltage 230 VAC/50 HzRating of the main fuse F1 (230 VAC) 6.3 ATFuse rating F2 (230 VAC) 2 ATFan-DC 24 VDC

A Routing of the 230 V cables B Routing of the sensor cables C Power supply cable D 6.3 AT fuse E 2 AT fuse

CAUTIONThe following components of the appliance are at avoltage of 230 V:- Boiler pump- Combined gas valve unit- Inverter valve- The majority of components in the control panel and theterminal box- Power supply cable

C002336-E

C

A BE

D

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3

2. Configuration to be done beforehand1. To access all parameters: first set the INSTALLATION parameter to EXTENDED.

In CLASSIC mode, only the parameters for a classic installation are displayed.The regulator automatically switches back to CLASSIC mode after 30 minutes (whether or not a key has beenpressed).

2. To control and adapt all parameters according to the type of installation:the following chapters give the connections and parameter settings to be made.

Press Display Select Display Press Display

Installer access

for 5 sec.

#LANGUAGE#SYSTEM#NAMES OF THE CIRCUITS#...

#SYSTEM INSTALLATION CLASSIC

Press the rotary button Turn the rotary button

to select the parameter: INSTALLATION EXTENDED Press the rotary button

to confirm

INSTALLATION EXTENDED

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3

3. Connecting a direct circuit

Diagram:Not used: Do not connect anything to the terminal block.Connect the outside temperature sensor.Connect a safety thermostat if the heating circuit is for underfloor heating.Remove the bridge. Connect the wires from the safety thermostat to the connector.Not used: Do not connect anything to the terminal block.

Parameter settings to be made for this type of installation: If underfloor heating is connected directly (without mixing valve), set the parameter IN.BL as follows:

Configuration of the outlets should not be modified; the factory setting below is suitable:

(1) The parameter is only displayed if INSTALLATION parameter is set to EXTENDED. To switch to EXTENDED mode : See page 22.

The factory presetting of the other parameters used in this type of installation is suitable but can be customised if necessary (See table below):

For more detailed information on the parameters: See section 4.

Press Display Select Display Select Display SelectInstaller access

for 5 sec.

#LANGUAGE#SYSTEM#...#PRIMARY INSTAL.P

#PRIMARY INSTAL.P BURN.MIN.RUN(1)

TIMER GENE P.IN.BL

IN.BL STOP HEATTOTAL STOPSAFETY MODE

STOP HEAT

Parameter Factory setting Access: Menu Select Remarks

CIRC. A:(1) DIRECT "Installer" level #SYSTEM CIRC. A:(1) Keep the factory setting

Parameter Factory setting Access: Menu Select RemarksCIRC.CURVE A 1,5 "Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE A If circuit A is for underfloor

heating, set the value to 0.7.

G000059

2

3

On/off

OT BL RL Tout Tdhw

1

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1

S SYST + TA - S ECS S EXT S DEP C

2 12 12 12 1 2 1S DEP B

2 1

SCU PCU

M

4

23

3

4. Connecting a direct heating circuit and a domestichot water tank

Diagram:Not used: Do not connect anything to the terminal block.

CAUTION: Do not connect anything to the DHW pump outlet as the reversal valve is connected to the PCU PCB in the boilerConnect the outside temperature sensor.Connect a safety thermostat if the heating circuit is for underfloor heating.Remove the bridge. Connect the wires from the safety thermostat to the connector in the position marked BL, after first removing the bridge.Connect the DHW tank anode.

CAUTION: If the tank is fitted with a Titan Active System® impressed current anode, connect the anode to the inlet (+

on the anode, - on the tank). If the tank is not fitted with an impressed current anode, put the simulation connector in place (delivered with

the DHW sensor - package AD212)Connect the DHW sensor (Package AD212).Connect the domestic hot water looping pump (Optional).Not used: Do not connect anything to the terminal block.

3

4

5

6

7

8

On/off

OT BL RL Tout Tdhw

1 2

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

SCU PCU

G000060

M

24

3

Parameter settings to be made for this type of installation:





Press Display Select Display Select Display Select

Installer access

for 5 sec.


Parameter settings for IN.BL to connect the TS to an underfloor heating system

#PRIMARY INSTAL.P BURN.MIN.RUN(1)

TIMER GENE P.IN.BL

IN.BL STOP HEATTOTAL STOPSAFETY MODE

TOTAL STOP

Parameter settings for the DHW loop

#SYSTEM INSTALLATIONCIRC. A:(1)

...O.PUMP A(1)

O.PUMP A(1)

...CH.PUMP A...DHW LOOP...

DHW LOOP




CIRC.CURVE A 1,5"Installer" level #SECONDARY

INSTAL.P....CIRC.CURVE A If circuit A is for

underfloor heating, set the value to 0.7.

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3

5. Connecting two circuits and a domestic hot watertank before the mixing tank

Diagram:Not used: Do not connect anything to the terminal block.

CAUTION: Do not connect anything to the DHW pump outlet as the reversal valve is connected to the PCU PCB in the boilerConnect the outside temperature sensor.Connect the heating pump (circuit A)Nota : If underfloor heating is being used, put a safety thermostat in place after the heating pump. Remove the bridge. Connect the wires from the safety thermostat to the connector in the position marked BL, after first removing the bridge.The safety thermostat will shut down the heating pump in the event of overheating.Connect the 3-way valve motor (circuit B) and the circuit B flow sensor (FL S B).Connect the heating pump (circuit B).Connect a safety thermostat if the heating circuit is for underfloor heating:Remove the bridge. Connect the wires from the safety thermostat to the connector.Low loss header.Connect the DHW sensor (Package AD212).

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

TS + C AUXC

SCU PCU

G000061A

M

3

2

45

6 10

8

71

9

13

12

11

AD249

26

3

Connect the domestic hot water loop pump (optional) to the S.AUX outlet on the PCB option for mixing valve (Option: Package AD249).Connection of an additional circuit, with PCB option for mixing valve (Option: Package AD249).Connect the DHW tank anode.



the DHW sensor - package AD212)Not used: Do not connect anything to the terminal block.

Parameter settings to be made for this type of installation: Configuration of the outlets should not be modified; the factory settings below are suitable.





CIRC. A:(1) DIRECT "Installer" level #SYSTEM CIRC. A:(1)

Keep the factory setting

CIRC. B:(1) 3WV "Installer" level #SYSTEM CIRC. B:(1)

O.PUMP A(1) CH.PUMP A "Installer" level #SYSTEM O.PUMP A(1)

O.DHW:(1) RV "Installer" level #SYSTEM O.DHW:(1)

S.AUX:(1) DHW LOOP "Installer" level #SYSTEM S.AUX:(1)


CIRC.CURVE A 1,5

"Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE A If circuit A is for underfloor heating, set the value to 0.7.

CIRC.CURVE B 0,7 "Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE B

27

3

6. Connecting two circuits and a domestic hot watertank after the mixing tank

Diagram:Not used: Do not connect anything to the terminal block.Connect the outside temperature sensor.Connect the heating pump (circuit A)Nota : If underfloor heating is being used, put a safety thermostat in place after the heating pump. Remove the bridge. Connect the wires from the safety thermostat to the connector in the position marked BL, after first removing the bridge. The safety thermostat will shut down the heating pump in the event of overheating.Connect the heating pump (circuit B). Connect the 3-way valve motor.Connect the safety thermostat for the underfloor heating. Remove the bridge. Connect the wires from the safety thermostat to the connector.Low loss header.Connect the DHW tank load pump.Connect the DHW sensor (Package AD212).Connect the DHW tank anode.


on the anode, - on the tank).

G000042A

6

3 4

10

11

8

2

91

5

7

12

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

TS + C AUXC

SCU PCU

M

AD249

28

3

If the tank is not fitted with an impressed current anode, put the simulation connector in place (delivered with the DHW sensor - package AD212).

Connect the domestic hot water loop pump (optional) to the S.AUX outlet on the PCB option for mixing valve (Package AD249).Connection of an additional circuit, with PCB option for mixing valve (Package AD249).Not used: Do not connect anything to the terminal block.


Configuration of the outlets should not be modified; the factory settings below are suitable:





for 5 sec.

#LANGUAGE#SYSTEM#...

#SYSTEM INSTALLATIONCIRC. A:(1)

...O.DHW:(1)

O.DHW:(1) PUMPRV

PUMP



Keep the factory setting

CIRC. B:(1) 3WV "Installer" level #SYSTEM CIRC. B:(1)

O.PUMP A(1) CH.PUMP A "Installer" level #SYSTEM O.PUMP A(1)

S.AUX:(1) DHW LOOP "Installer" level #SYSTEM S.AUX:(1)

Parameter Factory setting Access: Menu Select RemarksCIRC.CURVE A 1,5 "Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE A If circuit A is for

underfloor heating, set the value to 0.7.

CIRC.CURVE B 0,7 "Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE B

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3

7. Hot water storage tank connection7.1 QUADRO DU type storage tank

In this installation example, the storage tank (type QUADRO DU) incorporates a domestic hot water zone.The boiler starts up systematically to maintain the domestic hot water zone in the storage tank at temperature.

Diagram:Connect the heating pump (circuit A) Connect the DHW tank anode.

CAUTION: If the tank is not fitted with an impressed current anode, put the simulation connector in place (delivered with the DHW sensor - package AD212)Connect the DHW sensor (Package AD212).Connect the sensor from the storage tank (Package AD250).Buffer tank (Type QUADRO).Solar sensor probe.Connect the solar control system.Not used: Do not connect anything to the terminal block.Not used: Do not connect anything to the terminal block.

G000043B

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

SCU PCU

3

4

5

7

6

2

1

9

8

M

30

3

Operating principleThe DHW part is maintained at the DHW set point by the boiler.The heating zone is maintained at the set temperature calculated according to the outside temperature. The zone is reheated when the heating buffer temperature sensor falls -6°C below the calculated set temperature.Reheating in the heating zone stops when the heating buffer temperature rises above the calculated set temperature.


Configuration of the outlets should not be modified; the factory settings below are suitable:





Installer access

for 5 sec.


#SYSTEM INSTALLATION...O.DHW:(1)

...I.SYST(1)

...

O.DHW:(1) PUMPRV

PUMP

I.SYST(1) SYSTEM STORAGE TANKDHW STRATST.TANK+DHW

STORAGE TANK


CIRC. A:(1) DIRECT "Installer" level #SYSTEM CIRC. A:(1) Keep the factory settingO.PUMP A(1) CH.PUMP A "Installer" level #SYSTEM O.PUMP A(1)

Parameter Factory setting Access: Menu Select RemarksCIRC.CURVE A 1,5 "Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE A

31

3

7.2 PS type storage tank and DHW tank loaded by the boilerThe boiler starts up systematically to maintain the storage tank or the DHW tank at temperature.

Diagram:Connect a domestic hot water tank if the storage tank is only used for heating.Connect the DHW sensor (Package AD212).Connect the heating pump (circuit A) Buffer tank.Connect the sensor from the storage tank (Package AD250).Solar sensor probe.Connect the solar control system.Connect the DHW tank anode.



the DHW sensor - package AD212).Not used: Do not connect anything to the terminal block.Not used: Do not connect anything to the terminal block.

2

10

G000030A

9

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

SCU PCU

1

3

5

7

68

M

4

32

3

Operating principleThe storage tank is maintained at the DHW set point by the boiler.The storage tank is maintained at the set point calculated as a function of the outside temperature. The storage tank is reheated when the heating storage temperature sensor falls below the set point calculated -6°C.Reheating of the storage tank stops when the heating storage temperature falls below the boiler set point calculated.


Configuration of the outlets should not be modified; the factory settings below are suitable ;





for 5 sec.


#SYSTEM INSTALLATION ...I.SYST(1)

I.SYST(1) SYSTEM STORAGE TANKDHW STRATST.TANK+DHW

STORAGE TANK



Keep the factory settingO.PUMP A(1) CH.PUMP A "Installer" level #SYSTEM O.PUMP A(1)

O.DHW:(1) RV "Installer" level #SYSTEM O.DHW:(1)

Parameter Factory setting Access: Menu Select RemarksCIRC.CURVE A 1,5 "Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE A Adjust if

necessary

33

3

7.3 PS type storage tank and DHW tank loaded by this storage tankThe boiler only starts up production of domestic hot water if the storage tank is not hot enough to guarantee tankloading.

Diagram:Connect the heating pump (circuit A).Connect the sensor from the storage tank (Package AD250)Buffer tank (Type PS)Domestic hot water boilerConnect the DHW sensor.Connect the DHW tank load pumpConnect the DHW tank anode.



the DHW sensor - package AD212).Solar sensor probe.Connect the solar control system.Not used: Do not connect anything to the terminal block.Not used: Do not connect anything to the terminal block.

G000044A

7

6

9

8

1

3

5

24

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

SCU PCU

11

10

M

34

3

Operating principleThe DHW tank is loaded from the storage tank. If, during DHW loading, the temperature of the storage tank falls belowthe primary DHW set point, the boiler maintains the latter at temperature to guarantee loading of the DHW tank.The storage tank is maintained at the set point calculated as a function of the outside temperature. The storage tank is reheated when the heating storage temperature sensor falls below the set point calculated -6°C.Reheating of the storage tank stops when the heating storage temperature falls below the boiler set point calculated.







Installer access

for 5 sec.


Parameter settings for I.SYST for connecting the storage tank sensor#SYSTEM INSTALLATION

...I.SYST(1)

...

I.SYST(1) SYSTEM...DHW STRATST.TANK+DHW

ST.TANK+DHW

Parameter settings for P.DHW for connecting the DHW tank load pump#SYSTEM INSTALLATION

...O.DHW:(1)

...

O.DHW:(1) PUMPRV

PUMP



Parameter Factory setting Access: Menu Select RemarksCIRC.CURVE A 1,5 "Installer" level #SECONDARY INSTAL.P.... CIRC.CURVE A

35

3

8. Pool connection

Diagram:Connect the secondary swimming pool pump.Remark: if the pump is also used for filtration, fit a bypass to the filter.Connect the swimming pool sensor.Plate heat exchanger.Pool heating cut-off control.When the parameter I.TEL: is on 0/1 B, the swimming pool is no longer heated when the contact is open (factory setting), only the antifreeze continues to be active.The contact direction can still be adjusted by the parameter CT.TEL.Connect the primary swimming pool pump.Not used: Do not connect anything to the terminal block.Not used: Do not connect anything to the terminal block.

G000045

1

3 52

6

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

SCU PCU

410

36

3


(1) The parameter is only displayed if INSTALLATION parameter is set to EXTENDED. To switch to EXTENDED mode : See page 22.(2) See section 4, Parameter: 0/1 B

Controlling the pool circuitThe control system can be used to manage a swimming pool circuit in both cases:Case 1: The control system regulates the primary circuit (boiler/exchanger) and the secondary circuit(exchanger/pool). Connect the primary circuit pump (boiler/exchanger) to the pump B outlet. The temperature MAX.CIRC.B is then

guaranteed during comfort periods on programme B in summer and winter alike.

Connect the pool sensor (package AD212) to the S OUTL B input.

Set the swimming pool sensor set point using key in the range 5 to 39°C.Case 2: The pool has already a regulation system that is to be kept. The control system only regulates theprimary circuit (boiler/exchanger). Connect the primary circuit pump (boiler/exchanger) to the pump B outlet. The temperature MAX.CIRC.B is then

guaranteed during comfort periods on programme B in summer and winter alike.

Hourly programming of the secondary circuit pumpThe secondary pump operates during programme B comfort periods in summer and winter alike.

StoppingTo prepare your pool for winter, consult your pool specialist.

It is also possible to connect the swimming pool to circuit C by adding the PCB + flow sensor option (PackageAD249). Make the connection to the terminal blocks marked C. Set the parameters for circuit C.


Installer access

for 5 sec.


#PRIMARY INSTAL.P#...#...#...

#SECONDARY LIMITS#...

Parameter settings for CIRC. B: for connecting the primary swimming pool pump:#SYSTEM INSTALLATION

...CIRC. B:(1)

...

CIRC. B:(1) 3WVSWIM.P.DIRECT

SWIM.P.

Parameter settings for I.TEL: for controlling swimming pool heating shutdown:#SYSTEM INSTALLATION

...CIRC. B:(1)...I.TEL:(1)

I.TEL:(1) ANTIFR...0/1 B...

0/1 B (2)

Parameter settings for the temperature MAX. CIRC. B for the needs of the swimming pool exchanger:#SECONDARY LIMITS

MAX. CIRC. AMAX. CIRC. B ...

MAX. CIRC. B 50 °C Value to be set

37

3

9. Connecting a mixed tank (DHW)

Diagram:Not used: Do not connect anything to the terminal block.Auxiliary outlet - Option of connecting the electric DHW tank with the PCB + flow sensor option (package AD249) or to (circuit A).Option of connecting the electric tank: Outlet circuit A, or to ).Power control relay to the electrical resistor.Connect the DHW sensor (Package AD212).Connect the outside temperature sensor.Not used: Do not connect anything to the terminal block.Connect the DHW tank anode.



the DHW sensor - package AD212).

G000016A

5

6

4

7

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

TS + C AUXC

SCU PCU

8

M

1

2

3

AD249

38

3





Installer access

for 5 sec.


#SYSTEM INSTALLATION CIRC. A:(1)

...

S.AUX:(1)

...

CIRC. A:(1) DIRECT...DHW ELEC

DHW ELEC

orS.AUX:(1) DHW LOOP

...DHW ELEC

DHW ELEC

39

3

10.Connecting the optionsFor example: TELCOM remote vocal monitoring module, remote controls for circuits A and B, second DHW tank.

Diagram:Not used: Do not connect anything to the terminal block.Connect the load pump to the second tank.Second domestic hot water tank.Connect the DHW sensor from the second tank.Alarm indicator.Connect the TELCOM remote vocal monitoring module - depending on its availability in your country. See diagram next page.Connecting the BUS cascade, VM.Connect the remote control(s) (Package AD254/FM52))Not used: Do not connect anything to the terminal block.




for 5 sec.


Parameter settings for S.AUX: for connecting a second DHW tank:#SYSTEM INSTALLATION

...S.AUX:(1)

...

S.AUX:(1) DHW LOOP...DHW...

DHW

Parameter settings for O.PUMP A for alarm report :#SYSTEM INSTALLATION

...O.PUMP A(1)

...

O.PUMP A(1) CH.PUMP A...FAILURE

FAILURE

G000062

V

PRG

TELCOM 2

ALPAL2AL1

321

SET#09*

V8765

4321

71

5

9

On/off

OT BL RL Tout Tdhw

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1

S SYST + TA - S ECS S EXT S DEP C2 12 12 12 1 2 1

S DEP B2 1

TS + C AUXC

SCU PCU

34

2

8

6

MODE r

x 0 2 4 6 8 10 12 14 16 18 22 2420

c

MODE r

x 0 2 4 6 8 10 12 14 16 18 22 2420

c

AD249

40

3

Connecting the TELCOM vocal telesurveillance module

Power supply 230 V AC +10%/-15%The telephone outlet, terminals 3 and 4, is a potential-free relay, limited to 24 V.Not used: Do not connect anything to the terminal block.

TS + B A B

0-10V S AMB C

4 3 2 1 2 1 + - S AMB B

2 1 S AMB A

2 1

S SYST + TA - S ECS S EXT S DEP C 2 1 2 1 2 1 2 1 2 1

S DEP B 2 1

TS + C AUX C SCU

V

PRG

TELCOM 2

ALPAL2AL1

321

SET#09*

V8765

4321

10 V dc 230 V ac

1 2

NO NCC

3

NO NCC N (230 V) LNO NCC

1

2

3

G000013

AD249

41

3

11.Connection in cascade11.1 Cascade management principle

The DIEMATIC iSystem control panel can control up to 10 boilers in cascade and manage 10 DIEMATIC VM regulators.- the common flow temperature sensor (TEMP.SYSTEM parameter) is connected to the S.SYST inlet on the masterboiler (number 1)- a single outside temperature sensor can be connected to the master boiler or one sensor per boiler (zone controlsystem) can be connected.- the control panels are interconnected using bus cables,- the 3-way valve circuits in the boilers in the cascade are operable.- the flow set point is common to all boilers in the cascade.To form the cascade, set the corresponding parameters in the #NETWORK menu (CASCADE, MASTERCONTROLLER, etc.) for each of the boilers and DIEMATIC VM control system(s) in the cascade as described below.

• With the factory settings (FUNCT parameter on CLASSIC), the boilers automatically swap every 7 days (a new boiler becomes the master)It is also possible to swap the boilers manually: in the #SETTING menu, set the PERMUT parameter to the number of the boiler to remain in charge of the cascade.The (primary) pump for the boilers is started up whenever a burner demand is present and is stopped after the time delay TIMER GENE P. when the burner demand disappears. The primary pump on the master boiler continues to operate as long as a heating demand is present on one of the secondary circuits.

• Operating mode if the FUNCT parameter is set to PARALLEL:If the FUNCT parameter is set to PARALLEL and the outside temperature is lower than the PARALLEL.CASC set point (factory setting: 10°C), all boilers are started up simultaneously when there is a heating demand. If the outside temperature is higher than the PARALLEL.CASC set point, operation is identical to a CLASSIC cascade.

• Operating mode if the FUNCT parameter is set to CLASSIC:A boiler is added to the cascade when the common flow temperature falls below the set point less 3°C if no boilers are in demand. Every 4 minutes (or period equal to the parameter setting INTER STAGE TIMER, factory setting = 4 minutes), the control system analyses the variation in the common flow temperature. If this temperature has not increased by more than 6°C in this period of time and the common flow temperature is still lower than the set point by 3°C, a further boiler is added.

• Regardless of the setting of the FUNCT parameter (CLASSIC or PARALLEL):A boiler is removed when the common outlet temperature rises +3°C above the set temperature. Every 4 minutes (or period equal to the parameter setting INTER STAGE TIMER, factory setting = 4 minutes), the control system analyses the variation in the common flow temperature.If this common flow temperature has not fallen by more than 6°C and the common flow temperature is still higher than the set point by 3°C, a boiler is removed from the cascade.

42

3

• Correcting the set point temperature:The boiler set point temperature (CALC.T. BOILER) is corrected to factor in any variation in temperature due to the mixture in the pressure release cylinder:CALC.T. BOILER = CALC.T.CASC + Correction

Correction = CALC.T.CASC - SYSTEM TEMP. (correction limited to +10 / -10°C)

11.2 Possible checks (on the "master" boiler)

Access the "After Sales" level, Display menu #PARAMETERS:

Display the following parameters regarding the cascade:

WITHOUT CORRECTION WITH CORRECTION

For example:Deposit = 50 °CSYSTEM TEMP. = 45 °CCorrection = 50 - 45 = 5 °CCALC.T. BOILER = 50 + 5 = 55 °C

PERMUT Number of the active master boiler (cascade pilot).

NB.CASC.:Number of boilers recognised in the cascade.Used to check the correct parameter setting of the generators in the cascade.Used to check the correct connection of the bus cables.

NB. VM: Number of DIEMATIC VM control systems recognised in the cascade

STAGE Number of boilers operating or in demand.

50°C 50°CSYSTEM TEMP.45°C

CALC.T.CASC.50°C

30°C

G000066A

55°C 55°CSYSTEM TEMP.= 50°C

CALC.T.CASC.= 50°C

30°C

G000067A

43

3

11.3 Parameter settings in the case of a cascade installation

Proceed in the following order: First set the parameters for the auxiliary boilers (numbers allocated: 2 to 9), Set parameters for the DIEMATIC VMs (numbers allocated: 20 to 39) if need be, Set the parameters for the "master" boiler (number allocated: 1).

Proceed as follows:

"Master" boiler"Auxiliary" boiler, no. 2"Auxiliary" boiler, no. 3DIEMATIC VM, no. 20"auxiliary".DIEMATIC VM, no. 21"auxiliary".

54

321M

G000031

BUS

M M

44

3

Parameter settings to be made:

(1) The parameter is only displayed if INSTALLATION parameter is set to EXTENDED. To switch to EXTENDED mode : See page 22. The regulator automatically switches back to CLASSIC mode after 30 minutes (whether or not a key has been pressed).


Cascade parameter settings on each of the "AUXILIARY" boilers:Installer access

for 5 sec.


#NETWORK(1)

#...#...

#NETWORK(1) CASCADE:

MASTER CONTROLLER...SLAVE NUMBER

CASCADE: ONOFF

ON

MASTER CONTROLLER

ONOFF

OFF

SLAVE NUMBER 2, 3... 2 : Boiler 23 : Boiler 3etc.

Cascade parameter settings on each DIEMATIC VM ("auxiliary".)

See the instructions supplied with the control unit and any remote control unit used20 : DIEMATIC VM no. 121 : DIEMATIC VM no. 2etc.

Cascade parameter settings on the "MASTER" boiler- Installer access

for 5 sec.


#NETWORK(1)

#...#...#...

#NETWORK(1) CASCADE:

MASTER CONTROLLER

SYSTEM NETWORK...

CASCADE: ONOFF

ON

MASTER CONTROLLER

ONOFF

ON

SYSTEM NETWORK NB. ELEMENTS.NETWORKADD SLAVEERASE NETWORK

ADD SLAVE: save the numbers of the "auxiliary" appliances previously set. The number is memorised each time the rotary button is pressed.

FUNCTPARALLEL CASC.INTER STAGE TIMER

Access:#NETWORK menu (See section 4, chapter 2.4)

45

3

11.4 DHW tank after the mixing tank

Diagram:"Master" boiler (number allocated = 1)."Auxiliary" boiler (number allocated = 2)."Auxiliary" boiler (number allocated = 3).D.H.W. load pump.DHW sensor.Cable BUS.Low loss header.Cascade outlet sensor. Connect the sensor to the terminal block E.SYST on the master boiler.



Operating principleAll of the boilers play a part in loading the DHW tank.

Press Display Select Display Select Display SelectParameter settings for P.DHW on the "MASTER" boiler -

Installer access

for 5 sec.



...

O.DHW:(1) PUMP RV

PUMP

Cascade parameter settings See chapter: 11.3 Parameter settings in the case of a cascade installation (page 44)

4

6 6

7

8

5

321M

G000046

M M

46

3

11.5 DHW tank on "master" boiler

Diagram:"Master" boiler (number allocated = 1)."Auxiliary" boiler (number allocated = 2)."Auxiliary" boiler (number allocated = 3).Low loss header.Cascade outlet sensor. Connect the sensor to the terminal block E.SYST on the master boiler.Cable BUS.DHW sensor.



Operating principleDHW tank loading is only handled by boiler . The other boilers continue to meet the heating needs.Boiler ("master") operates at high temperature whilst heating can operate at low temperature. To do this, set thePRIORITY DHW parameter to NO (#SECONDARY LIMITS menu) on boiler .

Press Display Select Display Select Display SelectParameter settings for P.DHW on the "MASTER" boiler -

Installer access

for 5 sec.



...

O.DHW:(1) PUMP RV

RV

Cascade parameter settings See chapter: 11.3 Parameter settings in the case of a cascade installation (page 44)

4

35

2

6

7

1M

G000014A

MM

47

4

LIST OF THE PARAMETERS

G000008

49

4

ContentsThe DIEMATIC iSystem control system incorporates 3 parameter levels

1. User parameter levelAccess: Key1.1 #MEASURES menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511.2 #CHOICE TIME PROG. menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521.3 #TIME PROGRAM menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531.4 #SETTING menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561.5 #TIME .DAY menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Access:Keys , MODE and 1.6 Adjusting the set point temperatures - Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 581.7 Choosing the operating mode - Key MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591.8 Domestic hot water production - Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

2. Installer parameter level Access: Key then

2.1 #LANGUAGE menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 602.2 #SYSTEM menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612.3 #NAMES OF THE CIRCUITS menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 642.4 #NETWORK menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 652.5 #PRIMARY LIMITS menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 662.6 #SECONDARY LIMITS menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 702.7 #PRIMARY INSTAL.P menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 722.8 #SECONDARY INSTAL.P menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

3. Technical support level and configuration

Access: Key then (5 seconds)

3.1 #PARAMETERS menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 783.2 #DEFAULT HISTORIC menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 793.3 #MESSAGE HISTORIC menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 793.4 #TEST OUTPUTS menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 803.5 #TEST INPUTS menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 803.6 #CONFIGURATION menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 823.7 #SUPPORT menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 823.8 #REVISION menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

4. Reset procedure (RESET) Page: 83

50

4

1. User parameter level

1.1 #MEASURES menu

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

#MEASURES#CHOICE TIME PROG.#TIME PROGRAM#SETTING#TIME .DAY

C002220-A-04

51

4

1.2 #CHOICE TIME PROG. menuFor each of the active circuits, assign a timer programme, P1 to P4

"User" level - #CHOICE TIME PROG. menu

Parameter Adjustment range DescriptionCURRENT PROG.A P1 / P2 / P3 / P4 Comfort programme activated (Circuit A)CURRENT PROG.B P1 / P2 / P3 / P4 Comfort programme activated (Circuit B)CURRENT PROG.C P1 / P2 / P3 / P4 Comfort programme activated (Circuit C)

52

4

1.3 #TIME PROGRAM menu"User" level - #TIME PROGRAM menu

Parameter Time schedule DescriptionTIME PROG.A PROG P2 A

PROG P3 APROG P4 A

Timer programme for circuit A

TIME PROG.B PROG P2 BPROG P3 BPROG P4 B

Timer programme for circuit B

TIME PROG.C PROG P2 CPROG P3 CPROG P4 C

Timer programme for circuit C

TIME PROG.DHW DHW circuit timer programmeTIME PROG.AUX Auxiliary circuit timer programme

53

4

To select to days for which the timer programme is to be modified

To select a timer programme to be modified.

Select or deselect the desired days by turning the rotary button:- Press the rotary button- Press key to select and key to deselect days- Turn the button

When the days desired for the programme have been selected, press the rotary button to confirm.

To modify or define time ranges, in comfort and reduced mode:

Turn the rotary button to "write" the comfort ( ) and reduced ( ) periods in the graphic bar:first press key for the comfort periods and for the reduced periods.

Press the rotary button to confirm.

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu We Th Fr Sa Su"Display of the timeprogram. To continuepush on the button"

C002229-A-04

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu We Th Fr Sa SuSet the time program.

C002230-D-04

06:00

06:00

54

4

Switch to the following desired period or programme and proceed in the same way.

55

4

1.4 #SETTING menu

56

4

1.5 #TIME .DAY menu

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

57

4

1.6 Adjusting the set point temperatures - Key

MODE

C002266-A

58

4

1.7 Choosing the operating mode - Key MODE

1.8 Domestic hot water production - Key

MODE

C002267-A

MODE

C002268-A

59

4

2. Installer parameter level

2.1 #LANGUAGE menu

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

TEMP.: 68°

C002271-F-04

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

#LANGUAGE#SYSTEM#NAMES OF THE CIRCUITS#PRIMARY LIMITS#SECONDARY LIMITS

C002236-B-04

60

4

2.2 #SYSTEM menu

61

4

(continued)

62

4

Influence of the parameter setting CT.TEL on the I.TEL contact

KT.TEL: setting: CLOSE OPEN

Operation according to the I.TEL: parameter settings and the status of the I.TEL: contact

ANTIFR- Contact closed: The antifreeze mode is active on all boiler circuits.- Contact open: The mode selected on the boiler is active.

- Contact closed: The mode selected on the boiler is active.- Contact open: The antifreeze mode is active on all boiler circuits.

0/1 A0/1 B0/1 C

- Contact closed: The mode selected on the circuit is active.- Contact open: The antifreeze mode is active on the circuit concerned.

- Contact closed: The antifreeze mode is active on the circuit concerned.- Contact open: The mode selected on the circuit is active.

0/1 DHW

- Contact closed: The mode selected on the DHW circuit is active.- Contact open: The antifreeze mode is active for the DHW circuit.

- Contact closed: The antifreeze mode is active for the DHW circuit.- Contact open: The mode selected on the DHW circuit is active.

0/1 AUX

Contact closed: - The AUX outlet is active- The boiler operates at a set point temperature equal to BOILER MAXContact open:- The AUX outlet is deactivated after the time delay H.PUMP DELAY has passed- The boiler operates with a set point temperature as a function of the outside temperature

Contact closed: - The AUX outlet is deactivated after the time delay H.PUMP DELAY has passed- The boiler operates with a set point temperature as a function of the outside temperatureContact open: - The AUX outlet is active- The boiler operates at a set point temperature equal to BOILER MAX

63

4

2.3 #NAMES OF THE CIRCUITS menuThis menu is used to customise the name of the various circuits and generator(s) according to the customer's wishes.We recommend making a note of the names chosen for each circuit or generator.

64

4

2.4 #NETWORK menuOnly displayed in "extended installation" mode

65

4

2.5 #PRIMARY LIMITS menu

66

4

Recommended Settings - All countries except: Belgium, Poland

* Factory setting(1) Model available only in the following countries: Italy, Slovenia.

* Factory setting

Gas type Parameter Unit MCA 10(1) MCA 15 MCA 25 MCA 25/28 MI

Gas H (G20) MIN.VENT. rpm 1800* 1800* 1800* 1800*MAX.VENT.BOIL rpm 3300* 4500* 5600* 4600*MAX.VENT.DHW rpm 3300* 4500* 5600* 6200*START SP. rpm 3300* 3700* 3000* 3000*

Gas L (G25) MIN.VENT. rpm 1800 1800 1800 1800MAX.VENT.BOIL rpm 3200 4400 5300 4300MAX.VENT.DHW rpm 3200 4400 5300 5900START SP. rpm 3200 3700 3000 3000

Propane (G31) MIN.VENT. rpm 2200 2200 1800 1800MAX.VENT.BOIL rpm 3200 4400 5300 4300MAX.VENT.DHW rpm 3200 4400 5300 5900START SP. rpm 3200 3700 3000 3000

Propane air (G230)(Italy)

MIN.VENT. rpm 2100 2100 1800 1800MAX.VENT.BOIL rpm 3200 4200 4900 4100MAX.VENT.DHW rpm 3200 4200 4900 5400START SP. rpm 3200 3700 3000 3000

All types of gas MAX.PUMP SPEED % 60 60 60 60MIN.PUMP SPEED % 20 20 20 20

Gas type Parameter Unit MCA 25/28 BIC MCA 35Gas H (G20) MIN.VENT. rpm 1800* 1700*

MAX.VENT.BOIL rpm 4600* 6200*MAX.VENT.DHW rpm 6300* 6200*START SP. rpm 3000* 4000*

Gas L (G25) MIN.VENT. rpm 1800 1700MAX.VENT.BOIL rpm 4300 6200MAX.VENT.DHW rpm 5900 6200START SP. rpm 3000 4000

Propane (G31) MIN.VENT. rpm 1800 1700MAX.VENT.BOIL rpm 4300 6200MAX.VENT.DHW rpm 5900 6200START SP. rpm 3000 4000

Propane air (G230)(Italy)

MIN.VENT. rpm 1800 1700MAX.VENT.BOIL rpm 4100 6200MAX.VENT.DHW rpm 5400 6200START SP. rpm 3000 4000

All types of gas MAX.PUMP SPEED % 60 60MIN.PUMP SPEED % 20 20

67

4

Recommended Settings - Belgium

* Factory setting

* Factory setting

Gas type Parameter Unit MCA 15 MCA 25 MCA 25/28 MIGas H (G20) MIN.VENT. rpm 1800* 1800* 1800*

MAX.VENT.BOIL rpm 4500* 5200* 4200*MAX.VENT.DHW rpm 4500* 5200* 5800*START SP. rpm 3700* 3000* 3000*

Gas L (G25) MIN.VENT. rpm 1800 1800 1800MAX.VENT.BOIL rpm 4500 4200 4200MAX.VENT.DHW rpm 4500 5800 5800START SP. rpm 3700 3000 3000

Propane (G31) MIN.VENT. rpm 2200 1800 1800MAX.VENT.BOIL rpm 4400 5300 4300MAX.VENT.DHW rpm 4400 5300 5900START SP. rpm 3700 3000 3000

All types of gas MAX.PUMP SPEED % 60 60 60MIN.PUMP SPEED % 20 20 20



Gas L (G25) MIN.VENT. rpm 1800 1700MAX.VENT.BOIL rpm 4200 5400MAX.VENT.DHW rpm 5800 6800START SP. rpm 3000 4000



68

4

Recommended Settings - Poland

* Factory setting

* Factory setting

Gas type Parameter Unit MCA 15 MCA 25 MCA 25/28 MIGas H (G20) MIN.VENT. rpm 1800* 1800* 1800*

MAX.VENT.BOIL rpm 4500* 5600* 4600*MAX.VENT.DHW rpm 4500* 5600* 6200*START SP. rpm 3700* 3000* 3000*

Gas Lw (G27) MIN.VENT. rpm 1800 1800 1800MAX.VENT.BOIL rpm 4400 5300 4300MAX.VENT.DHW rpm 4400 5300 6000START SP. rpm 3700 3000 3000

Gas Ls(G2.350)

MIN.VENT. rpm 1800 1800 1800MAX.VENT.BOIL rpm 4400 5300 4300MAX.VENT.DHW rpm 4400 5300 6000START SP. rpm 3700 3000 3000

Propane (G31) MIN.VENT. rpm 2200 1800 1800MAX.VENT.BOIL rpm 4400 5300 4300MAX.VENT.DHW rpm 4400 5300 5900START SP. rpm 3700 3000 3000

All types of gas MAX.PUMP SPEED % 60 60 60MIN.PUMP SPEED % 20 20 20



Gas Lw (G27) MIN.VENT. rpm 1800 1700MAX.VENT.BOIL rpm 4300 6200MAX.VENT.DHW rpm 6000 6200START SP. rpm 3000 4000

Gas Ls(G2.350)

MIN.VENT. rpm 1800 1700MAX.VENT.BOIL rpm 4300 6200MAX.VENT.DHW rpm 6000 6200START SP. rpm 3000 4000



69

4

2.6 #SECONDARY LIMITS menu

70

4

MAX.CIRC...

To meet this requirement, a safety thermostat must be electrically connected to the TS contact on the pump connector.

BCT parameterThe BCT (Base heat Curve Temperature) allows a minimum operating temperature to be imposed on the heating circuit(this temperature may be constant if the circuit gradient is nil).

When you modify the heating curve, and are recalculated and repositioned automatically.

Maximum temperature of the circuit Water temperature in the circuit for an outside temperature of 0°CDAY set point on the circuitOutside temperature for which the maximum water temperature in the circuit is reachedValue of the heating curveThis value corresponds to the parameter HEAT.CURV.

X Value set for BCT parameter

If using underfloor heating, do not modify the factory setting (50 °C). Regulations require asafety system independent of the control unit, with manual reset, which cuts the heat supplyto the underfloor heating when the temperature of the fluid reaches 65°C (France: DTU 65.14).

Heating curve without BCT Heating curve with BCT

20 0 -16

50

75C°

C°

1.5

C002319-B

1

2

34

5

20 0 -15

64

50

75C°

C°

0.7

C002320-B

1

2

X

34

5

71

4

2.7 #PRIMARY INSTAL.P menu

72

4

2.8 #SECONDARY INSTAL.P menu

73

4

(continued)

74

4

CIRC. CURVE ...: Heating curve circuit A, B or C

ROOM S.INFLUsed to adjust the influence of the room sensor on the water temperature for the circuit concerned.

x Outside temperature (°C)y Water flow temperature (°C)

Maximum temperature of heating circuit B - C

0 No influence (remote control fitted in a location with no influence)1 Slight influence3 Average influence (recommended)

10 Room thermostat type operation

M001678-B

1

75

4

SCREED DRYING: Used to force a constant flow temperature or a train to accelerate screed drying on underfloor heating. The setting forthese temperatures must follow the screed-layer's recommendations.Activation of this parameter (setting other than OFF) forces the permanent display of SCREED DRYING anddeactivates all other control system functions. When floor drying is active on a circuit, all other circuits (e.g. DHW) are shut down.The use of this function is only possible on circuits B and C.Every day at midnight (00:00): the set point (START DRYING TEMP) is recalculated and the remaining number of days(NB DAYS DRYING) is decremented.

For example:

STOP DRYING TEMPSTART DRYING TEMPTodayNUMB. DAYS DRY.Normal regulation (End of drying)

STOP DRYING TEMP 47 °CSTART DRYING TEMP 20 °CNUMB. DAYS DRY. 10 daysNormal regulation (End of drying)Heating temperature setting (°C)

2

34

1

5

G00

0055

00:00 00:00 00:00

2

10 9 8 7 6 5 4 3 2 1

23

20

26

29

32

35

38

41

44

47

4

4

5

1

6

G00

0056

00:00 00:00 00:00

76

4

NIGHTThis parameter is displayed if at least one circuit does not include a room sensor.For circuits without a room sensor:

NIGHT :DEC. (Reduced)The reduced temperature is maintained during reduced periods. The circuit pump operates constantly.

NIGHT :STOP(Stop)Heating is shut down during reduced periods. When installation antifreeze is active, the reduced temperature is maintained during reduced periods.

For circuits with a room sensor:When the room temperature is lower than the room sensor set point: The reduced temperature is maintained duringreduced periods. The circuit pump operates constantly.

When the room temperature is higher than the room sensor set point: Heating is shut down during reduced periods.When installation antifreeze is active, the reduced temperature is maintained during reduced periods.

Function 0-10 VThis function controls the boiler using an external system that includes a 0-10 V output connected to the 0-10 V input.This control imposes an instruction set temperature on the boiler. It will be necessary to ensure that the parameter BOILER MAX is higher than CONS.MAX 0-10V.

If the input voltage is less than VMIN/OFF 0-10V, the boiler is off.The boiler temperature setting corresponds strictly to the 0-10 V input. The secondary boiler circuits continue to operatebut have no impact on the water temperature in the boiler. If using the 0-10 V input and a secondary boiler circuit, theexternal regulator providing this 0-10 V power supply must always request a temperature at least equal to the needs ofthe secondary circuit.

1 Instruction set outlet temperature (°C)2 Power input signal (V) - DC3 0 V4 CONS.MIN 0-10V5 CONS.MAX 0-10V6 VMIN/OFF 0-10V7 VMAX 0-10V8 10 Vx Voltage at inputy Boiler temperatureM001679-A

5

1

4

3 6 2 7 8

77

4

3. Technical support level and configuration

Access: Key then for 5 seconds or: key, for 10 seconds.

3.1 #PARAMETERS menu

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

10"C002483-A-04

TEMP.: 68°bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

#PARAMETERS#DEFAULT HISTORIC #MESSAGE HISTORIC#TEST OUTPUTS#TEST INPUTS

C002314-C-04

78

4

(continued)

3.2 #DEFAULT HISTORIC menuThis menu gives the list of the most recent errors that have occurred in the appliance (up to 10 errors).

3.3 #MESSAGE HISTORIC menuThis menu gives the list of the most recent messages that have appeated in the appliance (up to 10 messages).

79

4

3.4 #TEST OUTPUTS menu

3.5 #TEST INPUTS menu

80

4

Control system sequence

81

4

3.6 #CONFIGURATION menu

3.7 #SUPPORT menuThis menu is used to fill in the contact details (name and phone number) of the company or the professional that theuser can contact if needed (Inspection, Fault finding...).

3.8 #REVISION menuThis menu is used to fill in the date of the next service or maintenance operation on the appliance.

82

4

4. Reset procedure (RESET)

1 Press key , and simultaneously for 4 seconds2 The menu #RESET is displayed3 Select the generator desired4 To set the following parameters

After reset (TOTAL RESET and RESET EXCEPT PROG.), the control system goes back to the display of the languagechoice after a few seconds.

Select the desired language by turning the rotary button

To confirm, press the rotary button.

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

MODE

SUNDAY 11:45

C002296-B-04

4"

+ +

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

C002301-C-04

#RESETGENERATOR : GENE

Français - Deutsch - English - Nederlands - Polski - Turkce - Italiano - Espanol - Pycck

bar

1

1

2

2

STD

0 2 4 6 8 10 12 14 16 18 22 2420

LANGUE FRANCAIS

C002286-B

83

5

LIST OF THE MESSAGES AND DEFECTS

85

5

CONTENTS

1. Messages (Code type Bxx or Mxx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

2. Faults (Code type Lxx or Dxx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

3. Deletion of sensors from the memory in the SCU PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

4. Deleting the IOBL 3WV modules from the memory in the SCU PCB . . . . . . . . . . . . . . . . . . 98

86

5

1. Messages (Code type Bxx or Mxx)In case of problem, a message displays and the boiler is temporarily blocked. In this case, the display gives a code ofblocking (code Bxx).

The boiler starts up again autonomously when the reason for the blocking has been removed.

87

5

2. Faults (Code type Lxx or Dxx)If an error is signalled on the appliance, the appliance is locked and the corresponding code is shown in a flashingdisplay window.List of errors:

89

5

(continued)

90

5

(continued)

91

5

(continued)

92

5

(continued)

93

5

(continued)

94

5

(continued)

95

5

(continued)

96

5

(continued)

97

5

3. Deletion of sensors from the memory in the SCUPCB

The configuration of the sensors is memorised by the SCU PCB.If a sensor error appears whilst the corresponding sensor is not connected or has been voluntarily removed, pleasedelete the sensor from the memory in the SCU PCB.

Press key ? repeatedly until "Do you want to delete this sensor?" is displayed

Select YES by turning the rotary button and press to confirm.

4. Deleting the IOBL 3WV modules from the memory inthe SCU PCB

The configuration of the IOBL 3WV modules is memorised by the SCU PCB.If a IOBL.3WV B DEF or IOBL.3WV C DEF error appears after voluntary deletion of a 3WV module, please delete themodule from the memory in the SCU PCB

Press key ? repeatedly until "Do you want to delete this module?" is displayed

Select YES by turning the rotary button and press to confirm.

To delete an IOBL V3V module from the SCU PCB memory:

Go to the menu #NETWORK and select REMOVE DEVICE.

98

5

100

6

CONTROLS AND SETTINGS

3,8 k

101

6

Contents

1. Testing the sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1031.1 Check and calibration of sensors on the DIEMATIC iSystem control system . . . . . . . . . . . . . . . . . . . . . . . 1031.2 Check of the outside temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1041.3 Ohmic values of the sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

2. Check of the electronic boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1062.1 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1062.2 Board access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1072.3 PCU PCB + SU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1082.4 SCU PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1092.5 Card PSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

3. Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

102

6

1. Testing the sensors

1.1 Check and calibration of sensors on the DIEMATIC iSystem controlsystem

A continuous surveillance of the sensors is assured by the DIEMATIC iSystem control system.This surveillance and the measurement and settings options offered by the DIEMATIC iSystem control panel can onlybe done on circuits for which sensors are actually connected.

1.1.1 Sensor circuit cut or short circuitedWhen a sensor circuit is cut or short circuited, the DIEMATIC iSystem control system displays the alarm messagecorresponding to the sensor concerned.

See section 5, List of the messages and defects.

1.1.2 Reliability of the sensor measuresThe sensors can be checked by displaying the temperature line for the sensor concerned in the #MEASURES menu.If the temperature is not displayed or there is too great a difference between the temperature displayed and the actualtemperature, check the resistance on the sensor concerned (see below) and its connection cable.

1.1.3 Switch-on and switch-off values compared with the set point valueWhen the tank temperature falls below 4°C, particularly when the installation is in holiday mode (antifreeze), the tankis reheated to 10°C.In after valve circuit B or C, the pump is shut down when the flow temperature exceeds the maximum temperature forthe circuit by 10°C. The pump restarts when the temperature falls below these 10°C.

103

6

1.2 Check of the outside temperature sensorThe outside sensor is installed on the outside wall adjacent to the heated area. It must be easily accessible.H : Inhabited height controlled by the sensor

: recommended position on a corner: Possible position

Z : Inhabited area controlled by the sensorThe sensor must be placed on the outside wall so that it is directly influenced by weather variations, but is not directlyinfluenced by solar radiations.

8800

N001

Advised positions

8800N002-C

8800

N002

Positions to be avoided

104

6

1.3 Ohmic values of the sensorsThe temperature/resistance correlation is shown below. If the values measured on the ohmmeter do not correspond to those in the table, replace the sensor.Nota: Disconnect the sensor to check its ohmic value.

Outside sensor Outlet sensor circuit B+CDomestic hot water sensor

Boiler sensorReturn sensor

-20 °C 2392 Ω 0 °C 32014 Ω -20 °C 98932 Ω-16 °C 2088 Ω 10 °C 19691 Ω -10 °C 58879 Ω-12 °C 1811 Ω 20 °C 12474 Ω 0 °C 36129 Ω-8 °C 1562 Ω 25 °C 10000 Ω 10 °C 22804 Ω-4 °C 1342 Ω 30 °C 8080 Ω 20 °C 14773 Ω0 °C 1149 Ω 40 °C 5372 Ω 25 °C 12000 Ω4 °C 984 Ω 50 °C 3661 Ω 30 °C 9804 Ω8 °C 842 Ω 60 °C 2535 Ω 40 °C 6652 Ω

12 °C 720 Ω 70 °C 1794 Ω 50 °C 4607 Ω16 °C 616 Ω 80 °C 1290 Ω 60 °C 3252 Ω20 °C 528 Ω 90 °C 941 Ω 70 °C 2337 Ω24 °C 454 Ω 80 °C 1707 Ω

90 °C 1266 Ω100 °C 952 Ω110 °C 726 Ω

105

6

2. Check of the electronic boards

2.1 Switching offThe appliance is switched off by pressing the On/Off button on the control panel. Then, disconnect the boilermains supply cable.

Switch off the mains electricity supply before carrying out any work.

Do not trap the cables when refitting.

106

6

2.2 Board accessProceed as follows:

1. Unscrew the 2 screws under the front panel by a quarter turn2. Remove the front panel

3. Open the holding clips located on the sides4. Tilt the control panel forward

5. Lift the clip located in front of the control panel6. Lift the control panel cover

7. Unclip the PCB cover

C002325-C

2

1

C002326-B

4

3

3

C002327-B

5

6

6

C002330-C

7

107

6

2.3 PCU PCB + SU

SU PCB

230 V main supply X3 Main ON/OFF switch Connection between mains supply 230 and SCU X4 Not connected F1: 6.3 AT fuse This fuse protects the whole boiler (PCU, SU and

SCU.

X5 Ignition transformer / Ionization probe

X6 Gas valve

F2: 2 AT fuse This fuse protects only boards PCU and SU

X7 Heating / DHW inversion valveX8 Boiler pump (230 V)

Connector SU + Card SUX9 Fan and safety thermostat control

Bus PCU - SCU connector BL-inlet of PCU board (can be configured) X10 Connector: PC interface connector (Recom) - Flowmeter

- PSU- Boiler temperature sensor- Return sensor- Pressure gauge- Boiler pump modulation

Fastening lock for the PCB NC : Not connected (Connector without function)

1

X3 X4 X5 X6 X7 X8 X9 X10 5

6

10

107

9 10 8

2

3

4

G000050

108

6

2.4 SCU PCB

230 V main supply

Terminal block 230 V

Sensor terminal block Mini-DIN connector for cascade bus

Connector for the programming tool (for updating of the SCU software version)

Bus PCU - SCU connector

Connector HMI

1

7

42

G000051

3

5 6

109

6

SCU PCB + Optional AD249 valve board

Optional AD249 valve board

G000052

G000054

Optional AD249 valve board

110

6

2.5 Card PSU

Card PSU Attachment

111

6

3. Electrical diagram

2 31K1

X1

X14X13 X12

X3X2 X4 X5

X6X7

X8X9

X10 X11

HLS

1 2 7 8 9 1 0

X123 4 5 6

X61 2 3

GN/YW

WHBL

GB

153

X21

X81 2 3

PUMP A

BRBL

GN/YW

3 1 2

X41

SCU-C

X111 2 3 4 5 6

WHGY

ORRD

GN

YW

DV

X71 2 3

WHBK

RD

1 3 2

X121

IT

X52 3 4 1

E

BKBL

GN/YW

GY

1 23

X22

PWMPUMP

12 13

BKBK

1 2

X116

FTSRTS

9

RD

1

BK

1

2 2

X115

8

BL

1

22

X114

PS

10 11

BKBK

3 1

X112

FS

2 3

BKBK

1 3

X113

X104 5 7 6

X111

BKBK

BK

BK

1 2 3 4

PSU

X92 3 4 5

X91

BKBK

BK

BK

1 2 4 5

FAN

1

BK

BK1

2

X117

BRBL

GN/YW

P230V, 50Hz

L N

SCU-C

X21 32

BL

BR

GN/YW

X11 23

BRBL

GN/YW

T001871-G

DIS

X34 3 2 15

BRBL

BRBL

GN/YW

3 1

4 2X51

S

PCU

112

6

DIS DIEMATIC iSystem-displayDV Inverter valveE Ignition electrodeFAN FanFS FlowmeterFTS Outlet sensorG Gas valveHLS Safety thermostatI Ignition transformerP 230 V main supplyPCU PCB for managing burner operation (Primary Control Unit)PS Pressure sensorPSU Parameter storage for PCBs PCU and SU (Parameter Storage Unit)PUMP A Modulating control on the boiler pumpPWM Modulation signal from the boiler pumpRTS Return sensorS On/Off switchSCU-C Diematic iSystem control panel PCB (Secondary Control Unit)

113

6

114

7

PRODUCT DEVELOPMENT

115

7

Contents

1. Software versions / Boiler model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

2. Technical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

116

7

1. Software versions / Boiler model

2. Technical information

2.1 IT2549 - New SCU EPROM software versionThe SCU PCB software version changes from V1.1 to V1.2

To check the SCU PCB software versionDisplay menu #MEASURES (Press the key)Turn the rotary button to display parameter CTRLThe software version is displayed : CTRL V...

or: check the label sticked on the SCU PCB:

Boiler model Card Reference of the SCU PCB (mounted board)

Reference in spare parts Versions Application date

MCA 15-25MCA 25/28 MI Card SCU

121742 / 200014268 S101048

V1.1 21/04/2009(since lounching)

MCA 15-25MCA 25/28 MI Card SCU V1.2 15/09/2009

MCA 35 Card SCU V1.2 since lounchingMCA 25/28 BIC Card SCU V1.2 since lounching

G000068 SCU PCB software versionSCU-board IOBL software version (not changed)

117

7

Updating of the software version

• The updating of the SCU PCB software version is necessary in following cases:

- Skipping of days on the display- False warning of following defects on the display: IOBL.3WV B DEF and IOBL.3WV C DEF

• The updating of the software version is made by using the programming tool.

The programming tool allows the software version updating of the following control panels: - DIEMATIC iSystem(Boilers MCA....) - DIEMATIC-m3 (Boilers C 230, GT 330... ).

Programming tool Connector for the programming tool

Refer to the instructions delivered with the package.

G000065A

TS + B AB

0-10V S AMB C

4 3 2 1 2 1+ -S AMB B

2 1S AMB A

2 1


2 12 12 12 1 2 1S DEP B

2 1

2

1

SCU

118

7

Modification details

• Main modifications:

- Corrected the skipping of days on the display- Corrected the problem of false warning on the display for following defects: IOBL.3WV B DEF and IOBL.3WV

C DEF

• Modifications on the display:

- In the menu #TEST INPUTS: addition of clock calibration on the display (CALIBRA.CLOCK). The parameteris only displayed if INSTALLATION parameter is set to EXTENDED.

- Addition of a vertical dotted line which means that a defect took place, on all the curves and not only on thecurve OUTLET TEMP. B.

- Correction of several translations (for example, the translation of OUI / NON in French is YES / NO in Englishand JA / NEIN in German)

- In the menu #TEST INPUTS: addition on the display of boiler radio module (MC.VERSION) and outside radio-controlled temperature sensor (OUTSI.S.VERSION) software versions.

- Correction of the descriptive texts for parameters TOTAL RESET and RESET PROG (they were inverted).- Correction of the descriptive texts for parameters VER.ROM and VERS.PARAM.PCU (they were inverted).- When adjusting a parameter and when a defect appears, the regulator stays in the menu. Previously it went

back on the main display with the display of the defect.- At the boiler start up: Deleted the sensor failure display for not connected sensors.- Deleted the sensor failure display SYST.SENS.FAIL., when activating a cascade and pairing with a DIEMATIC

VM, if the system sensor is not connected.

• Modifications at the regulation level:

- The relative DHW-priority (parameter PRIORITY DHW set on SLIDING) is no more taken into account bycircuit A when it is configured in "high temperature" (parameter CIRC. A: set to H.TEMP).

- If parameter OUT.ANTIFREEZE is set to NO, the installation antifreeze protection is no longer ensured.- If parameter O.DHW: is set to RV, it is no more necessary to set parameter B.P. DELAY to 0 to avoid the time-

delay to start after a domestic hot water production.- In cascade, the calculated set-point temperature sent to the PCU is equal to the measured boiler temperature,

minus 2 K (and no more minus 0.2 K), if the boiler temperature is above the boiler set point temperature. Itleaves more time for the boiler to modulate downwards, without stopping it.

- The 3-way valves B and C do not remain any more closed permanently between the tenth and the twentiethminute after switching on the boiler.

- When an IOBL (In One By Legrand) scenario switch sends an override to the control panel, it is now possible,from the DIEMATIC iSystem control panel to modify this overrideFor example:

- the scenario puts the boiler into DAY mode- on DIEMATIC iSystem control panel, an other operating mode can be choosen, for example automatic

mode.- In summer mode ( ), if parameter O.DHW: is set to RV and if the installation antifreeze becomes active or a

chimney sweeping is in progress, the switchover valve doesn't stay in DHW position, but switches into heatingposition.

119

© Copyright

In the interest of customers, DE DIETRICH THERMIQUE are continuously endeavouring to make improvements in product quality. All the

specifications stated in this document are therefore subject to change without notice.

DE DIETRICH THERMIQUE BP30 57 Rue de la Gare F-67580 MERTZWILLERTel.: (+33) 3 88 80 27 00 Fax: (+33) 3 88 80 27 99

www.dedietrich-heating.com

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